Shuttle-operating means for sewing-machines.



- N 5. 747,084. I PATENTED D3015, 190s.

. M; PIETSGH. SHUTTLE OPERATING MEANS FOR SEWING MACHINES;

APPLICATION FILED AUG. 10, 1903.

N0 MODEL. 3 SHEETS-SHEET 1.-

m: cams PEYERS 0a., Puofau'mu. WASHINGTON. n. c.

.No. 747,084. 'PATENTED DEO. l5, 19 Q3-.

M. PIETSOH. SHUTTLE OPERATING MEANS FOR SEWING MACHINES.

APPLICATION FILED AUG. 10, 1903.

H0 MODEL.

3 SHEETS-SHEET 2.

' ifilnaxms; 6 Q fiZWraiwz- UNITED A Patented December 15, 1903.

MAX PIETSCH, OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 747,084, dated December 1903- Application filed Afi ustlo, 1903. Serial No. 168,880. (No model.)

To aZZ whom it mag concern:

Be it known that I, MAX PIETSCH, a citizen of the United States, residing at New York which receives the shuttle-thread directly a bobbin.

is such that the loop of the needle-thread is from the original spool, and therefore obviates the necessity of winding. the thread upon The construction of the machine readily slipped over and off the shuttle which contains the spool without putting any undue strain or tension on the thread. Thus the invention can be successfully applied to family machines and other machines operating with a thin or weak thread.

In the accompanying drawings, Figure l is a front elevation of the upper part of a sewing-machine embodying my invention; Fig. 2, an end view, partly in section, thereof; Fig. 3, a section on line 3 3, Fig. 2; Fig. 4:, a similar section showing. the parts in different position; Fig. 5, a plan of the shuttle-lidoperating lever Fig. 6, a similar. viewshowing the parts in a different position; Fig. 7,

a section through the frame on line 7 7, Fig.

5; Fig. 8, a plan, partly in section, of the shuttle-race with the shuttle'omitted; Fig. 9, a similarview with the shuttle inserted and showing it at the beginning at therace; Fig. 10, a View similar to Fig. 9, with the shuttle near the end of the race; Fig. 11, a side view of the shuttle; Fig. 12, a bottom view of the shuttle, partly broken. away to expose the spool; Fig. 13, a front View of the shuttle, showing it open; Fig. 14, a section, line 14 14, Fig. 11; and Fig. 15, a side view of the shuttle, partly broken away,with the lid opened.

The letter a represents the work-plate of a sewing-machine. b is the head, 0 the needlebar, d the needle, and A the needle-thread, all as usual.

The shuttle e is made hollow and in the form of a box or tubular casing, which is adapted for the reception of an ordinary thread-spool f, so that the shuttle-thread B may be taken directly from the spool Without being wound upon a bobbin. The shuttle-thread B passes from spool f outwardly through a perforation e of shuttle e and is then engaged successively by a tension-spring e an eye e and a thread-guide 6 The front end of the shuttle e is provided with a beak which tapers gradually to a point and permits the shuttle to be readily passed through the loop of the needle-thread. This beak is composed of an upper relatively fixed gradually-tapering section e and of a lower movable abruptly-tapering section a which is hinged to the shuttle at c and is normally closed by a spring 6 After the point of the shuttle has entered the loop of the needle-thread the lid 6 opens, so that the loop .is distended and is readily passed over andslipped off the body of the shuttle without liability to tear. A horn a, secured to lid e and'projecting rearwardly beyond the. hinge 2?, prevents the thread A from being caught while slipping ofi the beak of the shuttle.

The means for reciprocating the shuttle and manipulating its lid are as follows: The slide g, which carries the shuttle, reciprocates in a race h andis operated from crank 2' by rod 2', pivotedto the. carrier at To carrier 9 there is secured a railj, guided in a keeper j and provided with an offset or shoulderj near its end, Fig. 1. The rail jis adapted to engage and tilt a lever 70, which turns on fulcrum Z0 and is held in engagement with the rail by a spring To lever Z0 is attached a spring-arm Z, carrying a pin Z, which is adapted to be projected through a slot h at race it into the path of the shuttle. When the rail j moves to the right, its shoulderj -will tilt lever 10 upward,

.and thus lower pin Z, which is then held in its lowermost position as long as lever is rides on the straight left-hand section of rail 7.

.When the rail moves to the left, the lever is shuttle.

arm Z has descended below and has cleared the shoulder k the pinZ willbe projected into the race by the resiliency of arm Z, Fig. 6. The movement of the shuttle e with relation to that of the pin is so timed that the latter is projected into the shuttle-race directly after the point of the shuttle has passed the pin during the forward movement of the As the pin is thus projected into the race it will enter a notch 2 formed directly back of the shuttle-point and between the fixed and movable jaws e e, Figs. 11 and 14. The notch e is located between an inclined flange e formed on lid 6 and a substantially horizontal flange 6 formed along jaw e the latter flange extending along the entire length of the shuttle. When the shuttle in its forward movement arrives with its point opposite the pin Z, the latter is in its uppermost position and is by the shoulder h withdrawn from the shuttle-race. The pin now descends within the slot h, so that the spring-arm l clears the shoulder h -and the pin is projected into the race. At the moment when the pin is thus projected into the race the shuttle during its forward movement has advanced to such an extent that the pin will enter the notch 6 The further descent of pin Z will take place during a simultaneous advance of the shuttle, and consequently the pin on riding along the flange e of lid e will open the latter against the action of spring a 4 In front of the slot h there projects into the shuttle-race a spreader h the lower and upper edges in h of which are adapted to engage, respectively, the flanges e e of the shuttle. In this way the lid 6 after being opened by the pin Z is held in its open position while the shuttle moves forward and then backward along the spreader 71 When in its backward movement the shuttle has cleared the spreader, the lid e will be closed by its spring 6 Thus it will be seen that the shuttle is closed during part of its movement to readily enter the needle thread-loop and is open during the remainder of its movement to slip the loop over its body. After the shuttle duringits return movement has passed the slot 71. the pin Z, which had previously been lowered, will again be raised into its uppermost position, in which position it will be withdrawn from the race by the engagement of the spring-arm Z with the shoulder h.

The carrier g is provided with a number of arms g, that sustain the shuttle, and with a rear flange 9 which takes the shuttle along. When the loop of thread A is passed over the shuttle, it is necessary that a gap be formed between the latter and the flange 9 so that the loop may slip ofl the shuttle. To this effeet I pivot to the carrier 9 at m a two-armed lever m, influenced by a spring m The upper arm of lever 'm projects back of shuttle e, Figs. 3 and 9, while its lower arm is adapted to engage a rail n, arranged at the bottom of the shuttle-race. When this arm strikes the rail n, it will tilt the lever m against the action of spring m and thus push the shuttle e slightly forward upon the arms g of carrier g, so that an opening is formed between the shuttle and the flange 9 Figs. 4 and 10. In this way the looped thread A is first permitted to pass between the shuttle and lever m and then between the shuttle and flange g Upon the return movement of the carrier the lever m is swung back into its normal position by spring m as soon as the lever has cleared the rail 01. The frictional contact between shuttle and race will cause a reengagement of the flange g with the shuttle at the beginning of the next forward movement of carrier g.

The loop formed by the needle-thread is considerably larger than that formed in the ordinary bobbin-machines. In order to close this loop, I pivot to the head I) at o a lever 0, having slot 0. This slot is engaged bya pin'c' of needle-bar 0, so that the lever is oscillated at each stroke of the needle-bar. The thread A passes through an eye 0 at the free end of lever 0, so that the lever will close a loop of considerable size.

It will be seen that by my invention I provide means for readily slipping the looped.

needle thread over the spool containing shuttle in such a manner. that the thread is not strained or apt to be torn. I am therefore enabled to apply the invention successfully to family sewing-machines and other machines operating with a weak thread.

What I claim is- 1. In a sewing-machine, a hollow shuttle having a pointed beak composed of an upper section, a lower spring-influenced hinged section, and a horn on the lower section that projects beyond the hinge, substantially as specified 2. In a sewing-machine, a hollow shuttle having a pointed beak composed of an upper fixed section and a lower flanged movable section, combined with means for opening the movable section, means for closing said section, and a spreader adapted to engage the beak-flange, substantially as specifled.

3. In a sewing-machine, a hollow shuttle having a flanged body, a pointed beak composed of an upper flanged section, a lower flanged movable section, and a rearwardlyextending horn on the movable section, substantially as specified.

4. A sewing-machine provided with a shuttle having a movable lid, a shuttle-carrier, a pin adapted to engage the shuttle-lid, means on the lid for cooperating with the pin, and means for raising and lowering the pin, substantially as specified.

5. A sewing-machine provided with a shuttle having a flanged movable lid, a shuttlecarrier, a pin adapted to engage the shuttlelid, means on the lid for cooperating with the pin, means for raising and lowering the pin, I carried by the lid for cooperating with the pin, IO and a spreader adapted to engage the lidsubstantially as specified. flange, substantially as specified. Signed by me at New York city, New York, 6. A sewing-machine provided with a shutthis 8th day of August, 1903. tle having a hinged lid, a shuttle-carrier, a

rail secured to the carrier, a lever engaged MAX PIETSCH' by the rail, a spring-arm connected to the le- Witnesses: ver, a shoulder adapted to engage the spring- FRANK V. BRIESEN,

arm, a pin secured to said arm, and means ARTHUR ZUMPE. 

